10 bestBasement Concrete Sealersof March 2026

Flex Seal Liquid MAX, Waterproof Rubber Seal, Patch Leaks, Repair Multi-Surface Indoor & Outdoor; Thick Coating for Roofs, Cracks, Gutters, Concrete, Basement, Foundation, White, 2.5 gal (9.46 L)

Flex Seal Liquid

9.7

Lithi-Tek 9500 Ultra Concentrate - 1 Gallon (Makes 5 GALLONS) Penetrating Concrete Sealer, Waterproofer Plus Densifier

Ghostshield

9.4

RadonSeal® Standard – Deep Penetrating Concrete Sealer (5-gal) | Basement Waterproofing & Radon Mitigation Sealer | Seals Concrete Against Water, Water Vapor, and Radon Gas | Permanent!

RadonSeal

9.1

Liquid Rubber Concrete Foundation and Basement Sealant - Indoor & Outdoor Waterproof Coating, Easy to Apply, Black, 1 Gallon

Liquid Rubber

8.8

RadonSeal Plus Deep-Penetrating Concrete Sealer (5-Gallon) - Basement Waterproofing & Radon Mitigation Sealer | Seals Concrete Against Water, Vapor, and Radon Gas

RadonSeal

8.5

OtherRelated productsUp to 33% off

CLARK'S Soapstone and Concrete Sealer - Natural Beeswax and Carnauba Wax Blend - Ideal for Countertops and Slate Surfaces - Concrete Countertop Wax - Carnauba Wax Food Grade - Large - 32 oz

Navaris Log Burner Rope Seal - Stove Sealing Cord - Replacement Sealer for Smoker Fire Log Wood Burning - 3 m Long (9'10") - 8 mm (1/4") Diameter - with Adhesive Glue and End Tape

MasonryDefender 1 Gallon Penetrating Concrete Sealant Sealer for Driveways, Patios, Sidewalks - Clear Water-Based Silane Siloxane Water Repellent

Protective Concrete Sealer in Clear, 3.78 L

LastiSeal Brick & Concrete Sealer (5-Gal) - Seals & Strengthens Brick, Concrete, Pavers, Porous Stone - 15-Year Waterproofing Warranty | Clear/Flat Finish, Interior & Exterior Use, No Slip

RadonSeal

8.2